A kind of production technology of copper magnesium alloy line
Technical field
The present invention relates to technical field of nonferrous metal processing, more particularly to a kind of production technology of copper magnesium alloy line.
Background technology
Aircraft antenna needs small volume, in light weight, intensity is high, can withstand up to hundreds of G overload and vibration, impact,
Also want high temperature resistant and consider hot and cold, damp, wet, salt fog influence.Magnesium copper alloy antenna is one kind of aircraft antenna, typically by line
Material uses after being coiled into twisted wire.Traditional copper magnesium line, which uses, above draws copper bar and the production of continuously elongated method, its technological process
- continuously elongated-- continuously elongated-annealing of annealing that is continuous up-casting-continuously elongated.The technological process is more complicated, meanwhile, by
It is as-cast structure in continuous up-casting, after follow-up machining deformation, its mechanical property still has shortcoming.
The content of the invention
For insufficient existing for existing production technology, the present invention devises a kind of production technology of copper magnesium alloy line.Utilize
Not only properties are excellent for the copper magnesium alloy wire rod of the technique productions, and technological process is short, efficient, energy-conservation.
In order to realize foregoing invention purpose, present invention employs following technical scheme:
Continuous up-casting-continuously extruded-stretching
The technical scheme is that:
1. continuous up-casting
Using Cu-CATH-1 as raw material, will be melted after Cu-CATH-1 pre-heating drying in smelting apparatus, using wood
Charcoal and graphite flakes covering copper liquid surface, using drawing copper bar on traction link seat.
It is that 0.72 ~ 0.75% ratio adds copper magnesium intermediate alloy into smelting apparatus according to content of magnesium.It is according to indium content
0.02 ~ 0.03% ratio adds copper and indium intermediate alloy into smelting apparatus.
The temperature of smelting furnace is 1180 DEG C ~ 1190 DEG C, is covered using the charcoal of drying, ensures the reducing atmosphere of smelting furnace;
Charcoal granularity is 30mm ~ 50mm, cladding thickness 100mm ~ 150mm.The temperature of holding furnace is 1170 DEG C ~ 1180 DEG C, using graphite
Scale covers, its cladding thickness 50mm ~ 60mm.
With copper bar is drawn on traction link seat, then copper bar enters take-up.Draw bar 500~590mm/min of speed, it is straight to draw bar
Footpath Ф 20mm, 35 DEG C~40 DEG C of cooling cyclic water outlet temperature.
The copper bar of preparation:Copper+magnesium+indium content be more than 99.99%, oxygen content be less than 0.001%, content of magnesium be 0.72 ~
0.75%, indium content is 0.02 ~ 0.03%, and resistivity is less than 0.03 Ω mm2/ m, tensile strength are more than 190MPa, and elongation percentage is big
In 50%.
It is 2. continuously extruded
The copper bar prepared using step 1 prepares copper magnesium line base, continuous extruder rotating speed is as raw material using continuously extruded unit
7 ~ 10r/min, a diameter of 12.5mm of copper magnesium line base.
3. stretching
The copper magnesium line base of gained stretches the technology being combined with online annealing using multi-pass, and emulsion is used in drawing process
Be lubricated and cool down, be first pulled to a diameter of 0.8~0.9mm greatly, then it is small be pulled to a diameter of 0.3~0.35mm, it is big draw during
Using resistance internal heat type continuous annealing, the concentration of emulsion is 10%~15% in big drawing process, and the concentration of emulsion is in small drawing process
6%~8%;The voltage annealed in described big drawing process is 31 V~35V, and speed is 1100~1300m/min.
Using above-mentioned technical proposal, have the advantage that:
1. using Cu-CATH-1 plate as raw material, reasonably optimizing content of magnesium and indium content, content of magnesium are 0.72 ~ 0.75%, indium
Content is 0.02 ~ 0.03%, and copper+magnesium+indium content is more than 99.99%, oxygen content and is less than 0.03 Ω less than 0.0010%, resistivity
mm2/m。
2. it is combined using stretching technique with online annealing technology, there is provided the copper magnesium alloy line of excellent in mechanical performance, contracting
Short technological process.Wherein tensile strength is more than 800MPa, elongation percentage is more than 1%.
3. flow of the present invention is short, efficient, energy-conservation.The present invention saves the passage of stretching compared with traditional handicraft, beneficial to effect
Fruit is to save energy consumption more than 30%, and lumber recovery reaches more than 75%.
Embodiment
With reference to specific embodiment, the present invention is further illustrated, but protection scope of the present invention is not limited to
This.
Embodiment 1
A kind of production technology of copper magnesium alloy line of the present embodiment 1 comprises the following steps:
Continuous up-casting-continuously extruded-stretching
Specific step is:
1. continuous up-casting
Using Cu-CATH-1 as raw material, will be melted after Cu-CATH-1 pre-heating drying in smelting apparatus, using wood
Charcoal and graphite flakes covering copper liquid surface, using drawing copper bar on traction link seat.
It is that 0.72% ratio adds copper magnesium intermediate alloy into smelting apparatus according to content of magnesium.It is 0.02% ratio according to indium content
Example adds copper and indium intermediate alloy into smelting apparatus.
The temperature of smelting furnace is 1180 DEG C, is covered using the charcoal of drying, ensures the reducing atmosphere of smelting furnace;Charcoal granularity
For 30mm, cladding thickness 100mm;The temperature of holding furnace is 1170 DEG C, is covered using graphite flakes, its cladding thickness 50mm.
With copper bar is drawn on traction link seat, then copper bar enters take-up.Draw bar speed 500mm/min, draw shank diameter Ф
20mm, 35 DEG C of cooling cyclic water outlet temperature.
The copper bar of preparation:Copper+magnesium+indium content is more than 99.99%, oxygen content 0.0005%, content of magnesium 0.72%, indium content
For 0.02%, the Ω mm of resistivity 0.0292/ m, tensile strength 210MPa, elongation percentage 52%.
It is 2. continuously extruded
The copper bar prepared using step 1 prepares copper magnesium line base as raw material, using continuously extruded unit, and continuous extruder rotating speed is
10r/min, a diameter of 12.5mm of copper magnesium line base.
3. stretching
The copper magnesium line base of gained stretches the technology being combined with online annealing using multi-pass, and emulsion is used in drawing process
Be lubricated and cool down, be first pulled to a diameter of 0.9mm greatly, then it is small be pulled to a diameter of 0.35mm, it is big draw during using in resistance
Hot type continuous annealing, the concentration for drawing emulsion in process greatly are 10%, and the concentration of emulsion is 8% in small drawing process;Described big drawing work
The voltage annealed in sequence is 32V, speed 1200m/min.
Performance test and analysis
Performance test is carried out to embodiment 1 by technology well known in the art, and test result analyzed, draw as
Draw a conclusion:
Content of magnesium is 0.72%, indium content 0.02%, copper+magnesium+indium content are more than 99.99%, oxygen content 0.0005%, resistance
The Ω mm of rate 0.0292/ m, wherein tensile strength are more than 800MPa, elongation percentage is more than 1%.
Above-described embodiment is only used for illustrating the inventive concept of the present invention, rather than the restriction to rights protection of the present invention,
All changes for carrying out unsubstantiality to the present invention using this design, all should fall into protection scope of the present invention.